Dave Saville wrote:[color=blue]
> Bad form to reply to one's own post but....
>
> With some help from another reader we established that it *can* work
> provided that both ends can solve going through NAT. My Zyxel is OK as
> it can embed the external IP address in the VOIP packet - but the
> other end was not. So my end was trying to reply to his *internal*
> address as he normally went through a STUN server. So we ended up with
> a one way conversation.
>
> Still no idea why my Line 1 can't call Line 2 though. Snooping the
> packets it appears that they are just throwing invites at each other.
> Anyone know where I can find the gory details of VOIP packets?
>[/color]
You don't say which Zyxel ATA but on the 2002's I have here, you just
dial #### and it dials the phone on the other port.